ruby

Benchmark Ruby code for performance comparison and profiling

Manage Ruby dependencies with Bundler

Start an interactive Ruby session (IRB) with project context loaded

Run RuboCop linter with smart defaults and auto-correction options

Run Rake tasks with smart discovery and execution

Master Ruby 3.2+ with metaprogramming, performance optimization, and idiomatic patterns. Use for advanced Ruby development, DSL creation, gem development, or performance tuning. <example> Context: User needs to optimize a slow Ruby method processing large datasets. user: "This method is taking too long to process our data, can you help optimize it?" assistant: "I'll analyze and optimize your Ruby code with profiling, memory optimization, and idiomatic Ruby patterns." </example> <example> Context: User wants to create a DSL for configuration. user: "I want to create a configuration DSL like RSpec's describe blocks" assistant: "I'll help you build a clean DSL using Ruby's metaprogramming features - blocks, instance_eval, and method_missing." </example> <example> Context: User needs help creating a gem. user: "How do I create and publish a Ruby gem?" assistant: "I'll guide you through gem structure, gemspec, testing setup, and publishing to RubyGems." </example>

This skill should be used when the user asks about "Bundler", "Gemfile", "Gemfile.lock", "bundle install", "bundle update", "bundle exec", "dependency management", "gem versions", "gem groups", "bundle add", "gem sources", or needs guidance on managing Ruby dependencies.

This skill should be used when the user asks about "design patterns", "SOLID", "factory pattern", "singleton", "observer", "strategy", "decorator", "adapter", "facade", "command pattern", "builder pattern", "dependency injection", "composition", "Ruby patterns", or needs guidance on implementing design patterns in Ruby.

This skill should be used when the user asks about "gem development", "create a gem", "gemspec", "publish gem", "RubyGems", "bundler", "gem structure", "gem versioning", "semantic versioning", "gem testing", "gem documentation", or needs guidance on creating and publishing Ruby gems.

This skill should be used when the user asks about "metaprogramming", "DSL", "domain-specific language", "method_missing", "define_method", "class_eval", "instance_eval", "module_eval", "hooks", "included", "extended", "inherited", "singleton class", "eigenclass", "dynamic methods", "eval", or needs guidance on Ruby metaprogramming techniques.

This skill should be used when the user asks about "Ruby performance", "optimization", "profiling", "benchmarking", "memory", "garbage collection", "GC", "benchmark-ips", "stackprof", "memory_profiler", "slow code", "speed up Ruby", or needs guidance on making Ruby code faster.

This skill should be used when the user asks about "Rake", "rake tasks", "Rakefile", "task dependencies", "rake namespace", "rake desc", "rake file tasks", "invoke", "execute", "task arguments", or needs guidance on creating and managing Rake tasks.

This skill should be used when the user asks about "Ruby basics", "blocks", "procs", "lambdas", "enumerables", "iterators", "pattern matching", "error handling", "exceptions", "Ruby 3 features", "Ractors", "Data class", "endless methods", "refinements", or needs guidance on Ruby language features and idioms.

This skill should be used when the user asks about "Ruby standard library", "stdlib", "FileUtils", "JSON", "CSV", "YAML", "Net::HTTP", "URI", "OpenStruct", "Struct", "Set", "Date", "Time", "Pathname", "StringIO", "Tempfile", "Logger", "OptionParser", or needs guidance on Ruby's built-in libraries.